APA (7th ed.) Citation

Douglas, G. W., & Taylor, R. J. (1970). Contributions to the flora of Washington. Zenodo.

Chicago Style (17th ed.) Citation

Douglas, G W., and R. J. Taylor. Contributions to the Flora of Washington. Zenodo, 1970.

MLA (9th ed.) Citation

Douglas, G W., and R. J. Taylor. Contributions to the Flora of Washington. Zenodo, 1970.

Warning: These citations may not always be 100% accurate.